Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbe0eb7682cfd12…

MALICIOUS

PDF

77.3 KB Created: 2021-09-12 20:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: afcff1a8d972ae1b6331d943b202bf0f SHA-1: 3bed1252ebfd95276c43917199caaf4c2371eb9c SHA-256: ddbe0eb7682cfd12f20c8d5b805c8dde0d51c8c3c2e134f58a6f94eb4752ef91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm, directing users to multiple websites hosted on compromised CMS platforms and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://aliguoriarchitetto.eu/userfiles/files/wanaranavidinofujixo.pdf In PDF document text
    • http://www.zywawiara.pl/pliki/bosunuwo.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/81ba3914a3a46562be080c6c324e8ba3/bofoganedibonin.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/35887335490.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161330c7718f84---12344831289.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/volafuvanilakiroginige.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/84232350438.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210908043640_1698448103.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/madino.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/56654353296.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/nozugekazitevigesiga.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/mixokuxagorifutefewe.pdfIn PDF document text
    • https://rafautama.com/uploads/file/47746797347.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ba17cf66d---95264128752.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/mutelimofadesalipanu.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/rozazesafiludamosiz.pdfIn PDF document text
    • http://dongkoo.com/uploads/editor/files/97577122545.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/nedonujafasegokapiwi.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/53289544081.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/970d83ff4969e9f0d21624b1a8c463c6/52876892617.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69034877960.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/68324496015.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/16007265556.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/27203903738.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210905_5595562535C1B0A9.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=wrong+turn+3+watch+onlinePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA91 10692 bytes
SHA-256: 4a80902269cfcefd0bb62b638cb1ba0b2467e6e9de34ef0db2518e16501c8321
font_01_sfnt_off0000e31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB31 17136 bytes
SHA-256: 95572fecee530260e0b32f2781e8bdb7a5d58c90728b3dc11d7b0a0bd6b46870